Chapter 7. Upgrading VB6 Projects to VB .NET

IN THIS CHAPTER

• Upgrading Your First VB6 Application

• The Visual Basic Compatibility Library

• Upgrading a More Complex Example

• Upgrading a Component Containing ADO

• The Upgrade Process

• Helping Your VB6 Applications Upgrade

So far, this book has focused on learning Visual Basic .NET, and how it differs from VB6. However, most readers have many projects written in VB6, and want to port those applications to VB .NET. Recoding every VB6 application into VB .NET is not something most people want to do, so it is helpful to see how VB .NET handles upgrading your applications.

Upgrading applications is a two-part process: First, you will use the Visual Basic Upgrade Wizard (sometimes called the Migration Wizard) to convert your VB6 application to a VB .NET application. Second, you will probably need to make some modifications to complete the upgrade process.

You can improve the conversion and minimize the number of changes you need to make by making a few modifications to your VB6 code. For example, avoiding the use of late-bound variables in your VB6 code is helpful to the wizard when it comes time to migrate. Other suggestions will be examined later.